Two versions are available. The only difference is the standard version is using Accusilicon oscillators and the advanced version uses Crystek osciillators for the USB input.

Standard Version

Advanced Version

The SDA-2 is aN high-performance D/A Converter with preamplifier and headphone amplifier. Fully balanced design. Based on XMOS's latest xCORE-200 series chipset for USB Audio input and the AKM497, AKM's third-generation DAC chip for DA conversion and the AK4118 digital audio s/pdif input receiver chip,. The STM32 main control CPU, Xilinx's large-scale FPGA processing the clock system circuit and digital audio stream. The amplifier is desgin is a 4-way full balanced circuit. Independent discrete class A amp.

PCM supports up to 384Khz, DSD uses native direct solution technology, supports up to DSD512, and all interfaces support DSD decoding.AKM's flagship DAC chip, the AK4497EQ supports DSD native direct solution mode. The DSD digital stream does not pass through the internal digital filter and modulator, and works in NOS mode. PCM can also work in NOS mode, which is in line with e.g. HQPlayer design concept.

SDA-2 is the first DAC / preamp / heapdhone product we developed using following technologies approach:

USB uses our first generation isolation technology: SCIT technology (Singxer capacitor isolation technique), SCIT technology is a full isolation technology (ground isolation), high-speed signal using 150Mbps isolation chip, low-speed signal using optocoupler isolation It can completely isolate the interference from the PC; the USB version of the high version can basically reach the level of the SU-1 independent digital interface.

Headhpone output

Compatibility

1, Windows 7, Windows 8, Windows 10; 32/64 bit, need to install a dedicated driver2, Native MacOS 10.6 and later, using the system comes with a driver3, Native Linux with UAC2 compliant kernel, using the system's own driver, (tested on Ubuntu and Daphile systems, based on INTEL X86 platform)4, Android OS 4.2 and above, the device needs to support OTG function, in general, the Android 5.0 system is supported by default, and the following 5.0 recommendations are used with a dedicated player.